The ACGIH recommendations are based on exposure levels that should be safe for repeated exposure, with minimal risk of adverse effects (including pain) to the back and the ability to operate a land-based vehicle. The result is qualitative, but the detector paper has a sensitivity of about 20 microliters (μL) of liquid. Also, the accumulation of organic deposits or buildup of film on the surface of the lamp will reduce sensitivity. PIDs are also affected by high humidity.
Use a soft cloth to wipe dirt, oil, moisture, or foreign material from the instrument. Toxic Gas Sensors Application and Principle of Operation Available toxic gas sensors include sensors for carbon monoxide, hydrogen sulfide, nitrogen dioxide, sulfur dioxide, chlorine, chlorine dioxide, phosphine, ammonia, hydrogen cyanide and hydrogen. Generally, use of these detection systems will be limited to specially trained and equipped personnel at the SLTC or other specially trained and equipped OSHA personnel. Alarms can be set for both dose and dose rate. D. Spectroscopy Application and Principle of Operation Portable handheld radiation spectroscopy instruments allow the user to identify radionuclides. Calibration Calibration is typically accomplished using fresh outdoor air (20.9 percent oxygen). Calibrate immediately before testing at or near the temperature of the tested atmosphere.
The SLTC does NOT perform analysis of biological samples in-house. The SLTC coordinates analysis of biological samples by contracted laboratories. Wipes and Sponges Wipes and sponges are often used because they can sample larger surface areas and have a higher collection efficiency compared to swabs. The frequency-weighting network mimics the human sensitivity to vibration at different frequencies. This meter can be used to warn the user that he/she has entered a radiation area that is above background radiation levels. B. Scalars Application and Principle of Operation Scalars are used to analyze samples of radioactive material and to quantify the amount of material present. The following sections highlight some types of equipment that may be used for sampling and detection of biological agents. A. Surface/Bulk Sampling Swabs Swabs have been used frequently when sampling surface areas for the presence of biological agents.